Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual era a série da atriz Teresa Graves antes do ano de 1993?
 ###Tabelas: CREATE TABLE first_round_selections (first_round_selections_id AUTO_INCREMENT PRIMARY KEY, Pick INT, Player VARCHAR, Team VARCHAR, Position VARCHAR, Hometown/School VARCHAR) CREATE TABLE current_clubs_2014_season (current_clubs_2014_season_id AUTO_INCREMENT PRIMARY KEY, Club VARCHAR, Position in 2013 VARCHAR, First season INT, First season of current spell INT, Number of seasons in Superettan INT, Number of seasons in second tier VARCHAR) CREATE TABLE members_of_the_georgia_state_house_of_representatives_2007-2008 (members_of_the_georgia_state_house_of_representatives_2007-2008_id AUTO_INCREMENT PRIMARY KEY, District INT, Representative VARCHAR, Party VARCHAR, First elected INT, Residence VARCHAR) CREATE TABLE fencing (fencing_id AUTO_INCREMENT PRIMARY KEY, Athlete VARCHAR, Event VARCHAR, Semifinal VARCHAR, Final VARCHAR, Rank VARCHAR) CREATE TABLE women (women_id AUTO_INCREMENT PRIMARY KEY, Year INT, Actor VARCHAR, Award VARCHAR, Series VARCHAR, Result VARCHAR)  
SELECT Series FROM women WHERE Year < 1993 AND Actor = teresa graves